Brainlies for best answer solve system of equations using elimination 4 x- y = 7

-2x - y = -9

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In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Combine like terms to make a simpler expression 3z+z